System for receiving undamped electric oscillations.



No. 892,312 PATENTED JUNEBO, 1908. O. SCHBLLBR.

SYSTEM FOR RECEIVING UNDAMPED ELEGTRIG OSCILLATIONS.

' APPLICATION FILED MALL 9, 1908.

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' T 0 all whom it may concern:

system comprising a conductive connection 2 is a similar view showing asystem comprisli UNITED STATES? PriditENT Ol l lfilil.

OTTO SOHELLER, OF STEGLIIZ, NEAR BERLIN, GERMANY.

SYSTEM FOR RECEIVING UNDAMPED ELECTRIC GSCILLATIONS.

Be it known that I, OTTO SCHELLER, engineer, a subject of the German Emeror, residing at 126 Albrecht-strasse, Steg itz, near Berlin, Germany,have invented certain new and useful Improvements in Systems forReceivin Undamped Electric Oscillations; and I do ereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to improvements in s stems tor receivingsubstantially unamped electric oscillations, and more particularly tothat class of systems in which the energy accumulated in a highfrequency-circuit is passed by impulses to a detector circuit through aninterrupter.

In former systems the amount of energy delivered to the detector fromthe high freuency circuit, and therefore the strength of t e signal orindication, has been limited to that developed in the high frequencycircuit which is necessarily determined by the dam ping effect of thedetector circuit as well as by the amplitude of the ctherwaves oroscilla- Lions received. I

The object of my invention is-to provide a system of this class in whicha multiple of the said ener may be accumulated, and in which suc 1energy as had not been spent during an oscillation of the detectorcircuit may be utilized with the next oscillation.

For the purpose of explaining the invention, I have shown two examplesillustrating the same in the accompanying drawin in which the sameletters of references have In said drawing Figure 1 IS a diagram of aincluded between the high frequency oscillating circuit and the detectort'll'flull and Fig.

ing an inductive connection in lieu of the conductive connection.

In Fig. 1 S represents a high frequency resonant circuit com rising acapacity C and a self-induction L; 2 represents a sonorous or resonantcircuit comprisin a capacit O and a selfinduction T of a telephone. isan interrupter and G a rectifier of any type.

In Fig. 2 S represents a high frequency circuit comprising a capacity Cand a self- Specification of Letters Patent.

Appilcation filed March 9, 1908.

induction L, S is a resonant circuit contain- Patented June 30, 1908.

Serial No. 419,962.

ing a selfinduction I1 and a capacity F of a cohercr either with orwithout additional ca pacity. C is a condenser for the source of thevoltage B serving to actuate a relay R. Z is an intermediate circuithaving no oscillation of its own and comprising sclfinductions L and Lan interrupter U and a rectifier G.

The operation of the systems is a follows: The self-oscillation of thecircuit must be in resonance with the energy taken from the ether ortransmitted to it. Therefore, the am litude of its oscillationsincreases with eacli oscillation as long as the losses become just aslarge as the energy which is intro duced from outside. As soon as theamplitude of the oscillations reaches a maximum, the interrupter Uconnects the two circ'uits S, and S and allows the energy to spread uponS By using suitable capacities and selfinductions, the distribution maybe effected in such a way, that almost all the energy flows to Now theconnection is again interrupted, both circuits resonate again with theirown oscillations, and S, collects again energy. cillations of S must bethe same as the number of the interru tions or multiples of the same. ifthis is t to case, the circuit S supplies energy to 5 during the samephase, whereby the amplitude of the oscillations in S also increases. Arectifier G allows the energy to pass from S to S only in the desireddirection. For this purpose, it is advisable to em loy an electrolyticcell or a valve-tube cit rer possessing an additional voltage or not. Asthe fundamental oscillation of S may be many times slower than thefundamental oscillation of 8,, it takes much more time for its amplitudeto reach a maximum. and a multiple of the energy of S, can beacruumlatcd therein. Besides the energy may have such form that it maybe easily erce tible to the senses in a simple way, for instance by atelc )honc.

hen the useful damping of the indicator circuit is very large it may besuitable to dispense with an accumulation of energy in this circuit; insuch case the interrupter must work at so many periods as to just makethe circuit 8., a periodical. Should this number of periods be too highso as not to be able to produce an easily perceptible sound in thetelephone, the energy, as described above, niust be transferred from thehigh frequency circuit into a circuit having a lower frequency end fromthere it must he transferred a second time by another interrupterpreferably coupled with the first one to another circuit whichoscillates still slower.

If the ranges of frequenc of the oscillatime do not difier too in therectifier ma'y' be entirely disjpensed with, in which circuits andadapted to transmit current imulses of determined directions from thehigh irequency circuit to the circuit of lower frequency and Workingsynchronously with the fundamental oscillation of the circuit of lowerequency and means permittingenergy to be transmitted in one directiononly 2. In a system for receiving substantial y undamped oscillations,the combination with a high frequency circuit, and a circuit of lowerfrequency, oi'an interrupter connecting said circuits and adapted totransmit current im ulses of determined directions from thehig frequencycircuit to the circuit of lower ire uency and Working synchronously Withthe undarnental oscillation of the circuit of lower frequency, and erectifier allowthe 4 in energy to be transmitted in cne direction on y.

3. In a system for receiving substantially undamp'ed oscillations, thecombination with a high frequency circuit, nd a circuit of lowerfrequency, of en inte-i' re er connecting said circuits and adaoted to1'ansniit current im ulses of determined directions from l frequencycircuit to the circuit of lower ire uency and Working synchronously withthe undamentsl oscillation of the cir, suit of lower frequency, and anelectrolytic cell allowing energy to be transmitted in one directiononly.

l. in a system for receiving substantially undamped oscillations, thecombination with a resonant receiying circuit, a detector or indicatingcircuit, and means for conveying energy between said circuits, saidmeans including an interrupter and a device to rerncit the ener y to betransmitted in one direc tion only. 1

5. A. receiving system for Wireless telegraphy comprising e resonantreceiving circuit, 1

a resonant indicator or detector circuit asso elated therewith, andelectrical connections between said circuits including an interrupterand a rectifier. V I

In testimony whereof I have aiiixed my signature, in presence of twoWitnesses.

OTTO SCH-ELLFER.

Witnesses:

i-lnunr HASPER,

Wonnnnsn HAUEET.

